Large-particle-size asphalt concrete construction process

A technology of asphalt concrete and construction technology, which is applied to cohesive pavement paved on site, roads, buildings, etc. It can solve the problems of uniformity of mixture, poor workability, loose and uneven driving of vehicles, and prevent high-temperature rutting deformation Effects of asphalt aging, compaction improvement, and stability improvement

Active Publication Date: 2021-08-10
河南中交路通工程监理咨询有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its larger particle size, thicker mixture, and less asphalt consumption, the uniformity and workability of the mixture itself are poor, and it is easy to cause segregation, water penetration, and uneven rolling results during construction. cause looseness while driving

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A large particle size asphalt concrete construction technology, comprising the following steps:

[0031] A. Prepare the pavement base before construction; including comprehensive leveling, cleaning, spreading adhesive layer and gravel, and rolling;

[0032] B. Mix the concrete material composed of aggregate, auxiliary material and asphalt according to the weight parts of 75-80, 30-35 and 10-15; the mixing time is 5-10min. After the mixing is completed, large particle size asphalt can be obtained Concrete, the exit temperature is controlled at 178-180°C, ready for use;

[0033] C. On-site paving of asphalt concrete; according to the requirements of paving two layers of asphalt concrete on the left and right, and two layers of asphalt concrete on the upper and lower sides, load the segmented and layered large-size asphalt concrete materials into vehicles, transport them to the construction site, and pave each layer When the paver paves slowly, uniformly and uninterrupted...

Embodiment 2

[0045] A large particle size asphalt concrete construction technology, comprising the following steps:

[0046] A. Prepare the pavement base before construction; use the combination of vehicles and manual methods to completely level and clean the surface of the pavement base, and then use a blower to blow off the floating ash in a vertical oblique line to remove the floating ash and dust on the surface of the pavement base. Mud; after that, use a spreader to spread the bonding layer, and then spread 7mm of crushed stones, and use a rubber wheel roller to roll the crushed stones after spreading, so that the crushed stones can be embedded in the bonding layer;

[0047] B. Mix the concrete material composed of aggregate, auxiliary material and asphalt in parts by weight of 80, 30 and 15; when mixing, the asphalt is heated with heat-conducting oil, and the heating temperature is 173°C. After the heating is completed, store the hot asphalt in The inside of the insulation tank, and ...

Embodiment 3

[0058] A large particle size asphalt concrete construction technology, comprising the following steps:

[0059] A. Prepare the pavement base before construction; use the combination of vehicles and manual methods to completely level and clean the surface of the pavement base, and then use a blower to blow off the floating ash in a vertical oblique line to remove the floating ash and dust on the surface of the pavement base. Mud; after that, use a spreader to spread the bonding layer, and then spread 9mm of crushed stones, and use a rubber wheel roller to roll the crushed stones after spreading, so that the crushed stones can be embedded in the bonding layer;

[0060] B. Mix the concrete material composed of aggregate, auxiliary material and asphalt according to the weight of 75, 35 and 10; when mixing, the asphalt is heated with heat conduction oil, and the heating temperature is 175°C. After the heating is completed, store the hot asphalt in The inside of the insulation tank,...

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PUM

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Abstract

A large-particle-size asphalt concrete construction process comprises the following steps: A, preparing a pavement base layer before construction; B, mixing 75-80 parts by weight of concrete materials composed of aggregate, 30-35 parts by weight of auxiliary materials and 10-15 parts by weight of asphalt; C, paving the asphalt concrete on site; D, compacting the asphalt concrete to form a large-particle-size asphalt concrete layer; and E, curing the pavement. According to the construction process, the engineering construction speed is increased, the equipment investment is reduced, the traffic closing time can be greatly shortened in an overhaul and reconstruction project, and the social and economic benefits are remarkable. The large-particle-size asphalt concrete pavement paved after construction can resist large plasticity and shear deformation and bear heavy traffic, has good rut resistance, improves the high-temperature stability of the asphalt pavement, and shows very obvious permanent deformation resistance compared with the traditional asphalt concrete.

Description

technical field [0001] The invention relates to the field of construction engineering, in particular to the field of road engineering construction, and in particular to a large particle size asphalt concrete construction process. Background technique [0002] With the increase of traffic volume, the increase of heavy vehicles and tire pressure, and the channelization of traffic vehicles, the anti-rutting ability of asphalt pavement (anti-high temperature cumulative deformation) and the durability of the pavement deteriorate. How to improve the anti-rutting ability of asphalt pavement and prolong the service life of the pavement has become a very important issue in highway construction. [0003] The types of mixtures commonly used in asphalt pavement in my country can be divided into three types of asphalt mixtures: fine-grained, medium-grained, and coarse-grained asphalt mixtures according to the particle size of the ore. In actual production, these types of mixtures are us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C7/18
CPCE01C7/18Y02W30/91
Inventor 张继锋陈林李天玉潘建丽刘雯张金辉魏旭薛仕奇
Owner 河南中交路通工程监理咨询有限公司
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